1.选择题- (共15题)
1.以下物质；(1) 甲烷；(2) 苯；(3) 聚乙烯；(4) 苯乙烯；(5) 2-丁炔；(6) 环己烷；(7) 邻二甲苯。既能使KMnO4酸性溶液褪色，又能使溴水因发生化学反应而褪色的是
2.以下物质；(1) 甲烷；(2) 苯；(3) 聚乙烯；(4) 苯乙烯；(5) 2-丁炔；(6) 环己烷；(7) 邻二甲苯。既能使KMnO4酸性溶液褪色，又能使溴水因发生化学反应而褪色的是
6.新兴的大脑营养学研究发现，大脑的生长发育与不饱和脂肪酸有密切的关系，从深海鱼油中提取的，被称为“脑黄金”的DHA就是一种不饱和程度很高的脂肪酸，它的分子中含6个碳碳双键，化学名称为二十二碳六烯酸，则它的分子组成应为
7.新兴的大脑营养学研究发现，大脑的生长发育与不饱和脂肪酸有密切的关系，从深海鱼油中提取的，被称为“脑黄金”的DHA就是一种不饱和程度很高的脂肪酸，它的分子中含6个碳碳双键，化学名称为二十二碳六烯酸，则它的分子组成应为
13.取经过编号的5支试管分别加入2mL 0．5mol／L过氧化氢溶液，进行如下实验，根据实验内容，下列说法正确的是
| 试管编号 | 1 | 2 | 3 | 4 | 5 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 加入物质 | 适量唾液 | 锈铁钉 | 生土豆块 | 熟土豆块 | 生土豆块+稀盐酸 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 实验结果 | 几乎无气泡 | 少量气泡 | 大量气泡 | 几乎无气泡 | 几乎无气泡
14.取经过编号的5支试管分别加入2mL 0．5mol／L过氧化氢溶液，进行如下实验，根据实验内容，下列说法正确的是
17.
The number of people invited_____fifty, but a number of them____absent for different reasons.
19.
—Who called me this morning when I was out?
—A man calling ______ Robert.
20.
To save class time, our teacher has ________ students do half of the exercise in class and complete the other half for homework. .
21.
—Susan, go and join your sister cleaning the yard.
—Why ____? John is sitting there doing nothing.
22.
In some restaurants, food and service are worse than ______ used to be.
25.
Everyone who comes to the party is given a wooden apple with _____ own names cut in it as a souvenir.
26.
We all thought ______ a question ________we could raise enough money for the project.
27.
They were all tired, but _____ of them would stop to take a rest.
29.
Our manager allowed _______to take a holiday next week.
30.
When they met, they stopped and said hello to_______.
34.
We should always keep ______ well-informed of the changing information.
35.
______is a fact that English is being accepted as an international language.
37.
It was at four o'clock in the afternoon ____ he and his grandpa reached the museum in Guanghan.
38.
It was not until 1920 ______ regular radio broadcasts began.
A. while B. which C. that D. since 试卷分析
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